# RC Gears vs CastleLink2

The clearest difference is rating: CastleLink2 at 5.0 against RC Gears's 4.5. RC Gears's advantage is ratings volume (55 vs 2) and iOS requirement (11.0 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CastleLink2 holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: RC Gears has 55 ratings behind it against 2, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on July 4, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | RC Gears | CastleLink2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (55 ratings)](https://appshunter.io/ios/app/rc-gears/id1545490832/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/castlelink2/id6743709203/reviews)** |
| Number of ratings | **55** | 2 |
| Positive reviews | 94.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | Free |
| Size | 60 MB | 35 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SkyRC Technology Co.,Ltd.](https://appshunter.io/developer/580032028) | [Castle Creations Inc](https://appshunter.io/developer/1377811229) |

## What reviewers say

### RC Gears

[App page](https://appshunter.io/ios/app/rc-gears/id1545490832)

This application connects to a specific corner weight system to measure and display the weight distribution of RC cars. Users can view data, calibrate the scale, and adjust settings like auto power-off via Bluetooth. It's designed for precise weight analysis in RC racing.

**Highlights:** Measure RC car weight distribution, View weight data via Bluetooth, Calibrate the scale, Set auto power-off time, Connects to SCWS2000 system

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate results
- ✨ Clean interface
- ✅ Works smoothly
- 💡 Compact and well-thought-out device

**What reviewers complain about**

- 🐛 Glitchy app
- 🐛 App freezing
- 🐛 Bluetooth connection issues
- 🐛 Incompatible with iOS 18
- 🐛 Reduced functionality compared to older versions

**Reported bugs**

- Doesn't connect to Bluetooth with iOS 18
- Shows errors on scales
- Max speed shown is rounded to a whole number
- App still freezing up when trying to get speed information
- Bluetooth reconnect not always working

**Requested features**

- Ability to save preset/default distances on drag mode
- Ability to export data for analysis (e.g., with Excel)
- Support for 1/5 cars
- More functions for GNSS performance analyzer
- Waterproof GNSS


### CastleLink2

[App page](https://appshunter.io/ios/app/castlelink2/id6743709203)

Connect to Castle Creations ESCs and BECs via Bluetooth to adjust settings, update firmware, and view data logs. Compatible with a wide range of ESCs and BECs, supporting both B-Link hardware versions.

**Highlights:** Connect to Castle Creations ESCs/BECs, Adjust settings, Update firmware, View data logs, Supports B-Link adapters, Wide ESC/BEC compatibility

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RC Gears free?

RC Gears is free to download, with no in-app purchases.

### Is CastleLink2 free?

CastleLink2 is free to download, with no in-app purchases.

### Which has better reviews, RC Gears or CastleLink2?

CastleLink2 is rated higher. RC Gears averages 4.5 out of 5 from 55 ratings, while CastleLink2 averages 5.0 from 2 ratings.

### Do RC Gears or CastleLink2 have ads?

Neither RC Gears nor CastleLink2 shows ads.

### Which is updated more often, RC Gears or CastleLink2?

RC Gears ships an update monthly, and CastleLink2 monthly. Most recently, RC Gears was updated on July 4, 2026 and CastleLink2 on September 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*